Finding the Third Proportional to 1,978,908 and 4,237,656

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978,908 : 4,237,656 = 4,237,656 : x
2. Step 2: Convert to fraction form
   1,978,908/4,237,656 = 4,237,656/x
3. Step 3: Cross multiply
   1,978,908x = 4,237,656 × 4,237,656
4. Step 4: Simplify right side
   1,978,908x = 17,957,728,374,336
5. Step 5: Solve for x
   x = 17,957,728,374,336/1,978,908
6. Step 6: Final answer
   x = 9,074,564.54